A local species which in our region is found mainly across the damper areas of Bucks and Oxon. Similar species include Gynnidomorpha alismana as well as Phalonidia udana. The latter has only recently been separated from manniana and is not yet known from our area but could potentially be found hiding here.

	Determination by Genitalia Examination (gen. det.) Required

Recorded in 24 (31%) of 78 10k Squares.
First Recorded in 1939.
Last Recorded in 2022.
(Data up to end 2022)